An unsigned act is one that has not been signed to a record label. Acts that release their own material on self-published CDs can also be considered unsigned. Often unsigned acts primarily exist to perform at concerts. In more recent years, the internet has helped promote the music of unsigned acts. Artists often post their music as MP3's on websites such as MySpace, PureVolume, iSound, MusicForte, Overplay, GarageBand.com, DMusic, BBC One Music, all4artists.com, Indie911, SoundClick and yourdub. Read more on Last.fm.